src/com/android/gallery3d/util/GDepth.java - platform/packages/apps/Gallery2 - Gitiles

 /*
  * Copyright (c) 2017, The Linux Foundation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *  * Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  * Redistributions in binary form must reproduce the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer in the documentation and/or other materials provided
  *    with the distribution.
  *  * Neither the name of The Linux Foundation nor the names of its
  *    contributors may be used to endorse or promote products derived
  *    from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 package com.android.gallery3d.util;

 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.net.Uri;
 import android.util.Base64;
 import android.util.Xml;

 import com.android.gallery3d.common.Utils;
 import com.android.gallery3d.exif.CountedDataInputStream;
 import com.android.gallery3d.exif.JpegHeader;

 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;

 import java.io.IOException;
 import java.io.InputStream;

 public class GDepth {
     private static final String TAG = "GDepth";
     private static final String GDEPTH = "http://ns.google.com/photos/1.0/depthmap/";
     private static final String GIMAGE = "http://ns.google.com/photos/1.0/image/";
     private static final String XMPNOTE = "http://ns.adobe.com/xmp/note/";

     private static final String SIGNATURE_STD = "http://ns.adobe.com/xap/1.0/\0";
     private static final String SIGNATURE_EXT = "http://ns.adobe.com/xmp/extension/\0";

     public static class Parser {
         private byte[] image;
         private byte[] ddm;
         private int roiX = 0;
         private int roiY = 0;
         private int roiWidth = 0;
         private int roiHeight = 0;

         public boolean parse(Context context, Uri uri) {
             InputStream is = null;
             if (uri == null) return valid();
             try {
                 is = context.getContentResolver().openInputStream(uri);
                 XMPStream stream = new XMPStream(is);
                 parse(stream);
                 if (stream.prepareExtended()) {
                     parse(stream);
                 }
             } catch (IOException ignored) {
             } finally {
                 Utils.closeSilently(is);
             }
             return valid();
         }

         public boolean valid() {
             return ddm != null && image != null;
         }

         private void parse(XMPStream stream) throws IOException {
             XmlPullParser parser = Xml.newPullParser();
             try {
                 parser.setInput(stream, null);
                 parser.nextTag();
                 int event = parser.next();
                 while (event != XmlPullParser.END_DOCUMENT) {
                     if (event == XmlPullParser.START_TAG && "Description".equals(parser.getName())) {
                         int count = parser.getAttributeCount();
                         for (int i = 0; i < count; ++i) {
                             String ns = parser.getAttributeNamespace(i);
                             if (GDEPTH.equals(ns)) {
                                 String name = parser.getAttributeName(i);
                                 String value = parser.getAttributeValue(i);
                                 if ("Data".equals(name)) {
                                     ddm = parseData(value);
                                 } else if ("RoiX".equals(name)) {
                                     roiX = Integer.parseInt(value);
                                 } else if ("RoiY".equals(name)) {
                                     roiY = Integer.parseInt(value);
                                 } else if ("RoiWidth".equals(name)) {
                                     roiWidth = Integer.parseInt(value);
                                 } else if ("RoiHeight".equals(name)) {
                                     roiHeight = Integer.parseInt(value);
                                 }
                             } else if (GIMAGE.equals(ns)) {
                                 if ("Data".equals(parser.getAttributeName(i))) {
                                     image = parseData(parser.getAttributeValue(i));
                                 }
                             } else if (XMPNOTE.equals(ns)) {
                                 if ("HasExtendedXMP".equals(parser.getAttributeName(i))) {
                                     stream.setExtended(parser.getAttributeValue(i));
                                 }
                             }
                         }
                     }
                     event = parser.next();
                 }
             } catch (XmlPullParserException ignored) {
             }
         }

         private byte[] parseData(String base64data) {
             return Base64.decode(base64data, Base64.DEFAULT);
         }

         // decode base64 encoded (and compressed) data into Bitmaps
         public Image decode() {
             Image img = new Image();
             img.bitmap = BitmapFactory.decodeByteArray(image, 0, image.length);
             Log.d(TAG, "bitmap: " + img.bitmap.getWidth() + "x" + img.bitmap.getHeight());
             image = null;

             img.depthMap = decodeDepthMap();
             Log.d(TAG, "ddm: " + img.depthMap.getWidth() + "x" + img.depthMap.getHeight());
             ddm = null;

             if (roiWidth == 0 || roiHeight == 0) {
                 roiWidth = img.bitmap.getWidth();
                 roiHeight = img.bitmap.getHeight();
             }
             img.roi = new int[]{roiX, roiY, roiWidth, roiHeight};
             return img;
         }

         private Bitmap decodeDepthMap() {
             Bitmap bitmap = BitmapFactory.decodeByteArray(ddm, 0, ddm.length);
             int width = bitmap.getWidth(), height = bitmap.getHeight();
             int[] pixels = new int[width * height];
             bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
             Bitmap out = Bitmap.createBitmap(width, height, Bitmap.Config.ALPHA_8);
             for (int i = 0; i < pixels.length; ++i) {
                 int p = pixels[i];
                 pixels[i] = (p & 0xff) << 24;
             }
             out.setPixels(pixels, 0, width, 0, 0, width, height);
             return out;
         }
     }

     public static class Image {
         public Bitmap bitmap;
         public Bitmap depthMap;
         public int[] roi;

         public boolean valid() {
             return bitmap != null && depthMap != null && roi != null;
         }
     }

     private static class XMPStream extends InputStream {
         private static final int START = 0;
         private static final int STANDARD = 1;
         private static final int EXTEND = 2;
         private static final int END = 3;

         private CountedDataInputStream stream;
         private String extended;
         private int status = START;
         private int chunk = 0;

         XMPStream(InputStream is) {
             stream = new CountedDataInputStream(is);
         }

         private boolean next() throws IOException {
             while (true) {
                 short marker = stream.readShort();
                 if (marker == JpegHeader.EOI || JpegHeader.isSofMarker(marker)) {
                     status = END;
                     return false;
                 }
                 if (marker == JpegHeader.APP1) {
                     int length = stream.readUnsignedShort();
                     if (status == STANDARD) {
                         if (length < SIGNATURE_STD.length()) {
                             stream.skipOrThrow(length - 2);
                         } else {
                             String s = stream.readString(SIGNATURE_STD.length());
                             if (SIGNATURE_STD.equals(s)) {
                                 chunk = length - SIGNATURE_STD.length() - 2;
                                 return true;
                             } else {
                                 stream.skipOrThrow(length - 2 - SIGNATURE_STD.length());
                             }
                         }
                     } else {
                         if (length < SIGNATURE_EXT.length()) {
                             stream.skipOrThrow(length - 2);
                         } else {
                             String s = stream.readString(SIGNATURE_EXT.length());
                             if (SIGNATURE_EXT.equals(s)) {
                                 if (extended == null) return false;
                                 String guid = stream.readString(32);
                                 if (!extended.equals(guid)) continue;
                                 // skip 2 32-bit integers
                                 stream.skipOrThrow(8);
                                 chunk = length - SIGNATURE_EXT.length() - 42;
                                 return true;
                             } else {
                                 stream.skipOrThrow(length - 2 - SIGNATURE_EXT.length());
                             }
                         }
                     }
                 }
             }
         }

         void setExtended(String guid) {
             extended = guid;
         }

         boolean prepareExtended() {
             if (extended != null) {
                 status = EXTEND;
             }
             return extended != null;
         }

         @Override
         public int read() throws IOException {
             byte[] b = new byte[1];
             int r = read(b, 0, 1);
             return r == -1 ? r : b[0];
         }

         @Override
         public int read(byte[] b, int off, int len) throws IOException {
             if (chunk > 0) {
                 int l = chunk > len ? len : chunk;
                 chunk -= l;
                 return stream.read(b, off, l);
             }
             if (status == START) {
                 if (stream.readShort() != JpegHeader.SOI) return -1;
                 status = STANDARD;
             } else if (status == STANDARD || status == END) {
                 return -1;
             }
             if (next() && chunk > 0) {
                 int l = chunk > len ? len : chunk;
                 chunk -= l;
                 return stream.read(b, off, l);
             }
             return -1;
         }
     }
 }
	/*
	* Copyright (c) 2017, The Linux Foundation. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are
	* met:
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following
	* disclaimer in the documentation and/or other materials provided
	* with the distribution.
	* * Neither the name of The Linux Foundation nor the names of its
	* contributors may be used to endorse or promote products derived
	* from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
	* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
	* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
	* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/
	package com.android.gallery3d.util;

	import android.content.Context;
	import android.graphics.Bitmap;
	import android.graphics.BitmapFactory;
	import android.net.Uri;
	import android.util.Base64;
	import android.util.Xml;

	import com.android.gallery3d.common.Utils;
	import com.android.gallery3d.exif.CountedDataInputStream;
	import com.android.gallery3d.exif.JpegHeader;

	import org.xmlpull.v1.XmlPullParser;
	import org.xmlpull.v1.XmlPullParserException;

	import java.io.IOException;
	import java.io.InputStream;

	public class GDepth {
	private static final String TAG = "GDepth";
	private static final String GDEPTH = "http://ns.google.com/photos/1.0/depthmap/";
	private static final String GIMAGE = "http://ns.google.com/photos/1.0/image/";
	private static final String XMPNOTE = "http://ns.adobe.com/xmp/note/";

	private static final String SIGNATURE_STD = "http://ns.adobe.com/xap/1.0/\0";
	private static final String SIGNATURE_EXT = "http://ns.adobe.com/xmp/extension/\0";

	public static class Parser {
	private byte[] image;
	private byte[] ddm;
	private int roiX = 0;
	private int roiY = 0;
	private int roiWidth = 0;
	private int roiHeight = 0;

	public boolean parse(Context context, Uri uri) {
	InputStream is = null;
	if (uri == null) return valid();
	try {
	is = context.getContentResolver().openInputStream(uri);
	XMPStream stream = new XMPStream(is);
	parse(stream);
	if (stream.prepareExtended()) {
	parse(stream);
	}
	} catch (IOException ignored) {
	} finally {
	Utils.closeSilently(is);
	}
	return valid();
	}

	public boolean valid() {
	return ddm != null && image != null;
	}

	private void parse(XMPStream stream) throws IOException {
	XmlPullParser parser = Xml.newPullParser();
	try {
	parser.setInput(stream, null);
	parser.nextTag();
	int event = parser.next();
	while (event != XmlPullParser.END_DOCUMENT) {
	if (event == XmlPullParser.START_TAG && "Description".equals(parser.getName())) {
	int count = parser.getAttributeCount();
	for (int i = 0; i < count; ++i) {
	String ns = parser.getAttributeNamespace(i);
	if (GDEPTH.equals(ns)) {
	String name = parser.getAttributeName(i);
	String value = parser.getAttributeValue(i);
	if ("Data".equals(name)) {
	ddm = parseData(value);
	} else if ("RoiX".equals(name)) {
	roiX = Integer.parseInt(value);
	} else if ("RoiY".equals(name)) {
	roiY = Integer.parseInt(value);
	} else if ("RoiWidth".equals(name)) {
	roiWidth = Integer.parseInt(value);
	} else if ("RoiHeight".equals(name)) {
	roiHeight = Integer.parseInt(value);
	}
	} else if (GIMAGE.equals(ns)) {
	if ("Data".equals(parser.getAttributeName(i))) {
	image = parseData(parser.getAttributeValue(i));
	}
	} else if (XMPNOTE.equals(ns)) {
	if ("HasExtendedXMP".equals(parser.getAttributeName(i))) {
	stream.setExtended(parser.getAttributeValue(i));
	}
	}
	}
	}
	event = parser.next();
	}
	} catch (XmlPullParserException ignored) {
	}
	}

	private byte[] parseData(String base64data) {
	return Base64.decode(base64data, Base64.DEFAULT);
	}

	// decode base64 encoded (and compressed) data into Bitmaps
	public Image decode() {
	Image img = new Image();
	img.bitmap = BitmapFactory.decodeByteArray(image, 0, image.length);
	Log.d(TAG, "bitmap: " + img.bitmap.getWidth() + "x" + img.bitmap.getHeight());
	image = null;

	img.depthMap = decodeDepthMap();
	Log.d(TAG, "ddm: " + img.depthMap.getWidth() + "x" + img.depthMap.getHeight());
	ddm = null;

	if (roiWidth == 0 \|\| roiHeight == 0) {
	roiWidth = img.bitmap.getWidth();
	roiHeight = img.bitmap.getHeight();
	}
	img.roi = new int[]{roiX, roiY, roiWidth, roiHeight};
	return img;
	}

	private Bitmap decodeDepthMap() {
	Bitmap bitmap = BitmapFactory.decodeByteArray(ddm, 0, ddm.length);
	int width = bitmap.getWidth(), height = bitmap.getHeight();
	int[] pixels = new int[width * height];
	bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
	Bitmap out = Bitmap.createBitmap(width, height, Bitmap.Config.ALPHA_8);
	for (int i = 0; i < pixels.length; ++i) {
	int p = pixels[i];
	pixels[i] = (p & 0xff) << 24;
	}
	out.setPixels(pixels, 0, width, 0, 0, width, height);
	return out;
	}
	}

	public static class Image {
	public Bitmap bitmap;
	public Bitmap depthMap;
	public int[] roi;

	public boolean valid() {
	return bitmap != null && depthMap != null && roi != null;
	}
	}

	private static class XMPStream extends InputStream {
	private static final int START = 0;
	private static final int STANDARD = 1;
	private static final int EXTEND = 2;
	private static final int END = 3;

	private CountedDataInputStream stream;
	private String extended;
	private int status = START;
	private int chunk = 0;

	XMPStream(InputStream is) {
	stream = new CountedDataInputStream(is);
	}

	private boolean next() throws IOException {
	while (true) {
	short marker = stream.readShort();
	if (marker == JpegHeader.EOI \|\| JpegHeader.isSofMarker(marker)) {
	status = END;
	return false;
	}
	if (marker == JpegHeader.APP1) {
	int length = stream.readUnsignedShort();
	if (status == STANDARD) {
	if (length < SIGNATURE_STD.length()) {
	stream.skipOrThrow(length - 2);
	} else {
	String s = stream.readString(SIGNATURE_STD.length());
	if (SIGNATURE_STD.equals(s)) {
	chunk = length - SIGNATURE_STD.length() - 2;
	return true;
	} else {
	stream.skipOrThrow(length - 2 - SIGNATURE_STD.length());
	}
	}
	} else {
	if (length < SIGNATURE_EXT.length()) {
	stream.skipOrThrow(length - 2);
	} else {
	String s = stream.readString(SIGNATURE_EXT.length());
	if (SIGNATURE_EXT.equals(s)) {
	if (extended == null) return false;
	String guid = stream.readString(32);
	if (!extended.equals(guid)) continue;
	// skip 2 32-bit integers
	stream.skipOrThrow(8);
	chunk = length - SIGNATURE_EXT.length() - 42;
	return true;
	} else {
	stream.skipOrThrow(length - 2 - SIGNATURE_EXT.length());
	}
	}
	}
	}
	}
	}

	void setExtended(String guid) {
	extended = guid;
	}

	boolean prepareExtended() {
	if (extended != null) {
	status = EXTEND;
	}
	return extended != null;
	}

	@Override
	public int read() throws IOException {
	byte[] b = new byte[1];
	int r = read(b, 0, 1);
	return r == -1 ? r : b[0];
	}

	@Override
	public int read(byte[] b, int off, int len) throws IOException {
	if (chunk > 0) {
	int l = chunk > len ? len : chunk;
	chunk -= l;
	return stream.read(b, off, l);
	}
	if (status == START) {
	if (stream.readShort() != JpegHeader.SOI) return -1;
	status = STANDARD;
	} else if (status == STANDARD \|\| status == END) {
	return -1;
	}
	if (next() && chunk > 0) {
	int l = chunk > len ? len : chunk;
	chunk -= l;
	return stream.read(b, off, l);
	}
	return -1;
	}
	}
	}